Well the best way to keep your body clean is to eat more fruits, veggies, nuts, etc...and eat less meat. Try to keep away from dairy products and you should be pretty clean. These types of products are usually derived from plants and are waaaay too expensive
The products are more aimed at people who have one issue or another detoxifying their system. For individuals whom struggle with their health this is a great solution. As one of these people whom have tried many thing over time this solution helped WAAAAAY more than the diet+excersize routines out there. So your opinion of waaaay to expensive is skewed by the fact that the product is obviously not something you could pull the full benefit of what it is from.